How to Target iOS from Rust

To target iOS from Rust, you must install the iOS target toolchain and configure your build to use the correct architecture and deployment target.

1. Install the iOS target for your Rust toolchain by running rustup target add aarch64-apple-ios.
2. Create a Cargo.toml profile for iOS that sets the target and linker flags, adding [profile.release] with lto = true and opt-level = 's' if needed.
3. Build your library for iOS by running cargo build --release --target aarch64-apple-ios.
4. Link the resulting .a or .dylib file into your Xcode project using the Other Linker Flags build setting.

Targeting iOS from Rust lets you write code that runs on iPhones and iPads. You install special tools that tell Rust how to compile code for Apple's chips instead of your computer's. It's like translating a book into a specific dialect so only speakers of that dialect can read it.